COMPOST PRODUCTION FROM MALAPARI SEED CAKE (Pongamia pinnata L.)

Biodiesel production from malapari (Pongamia pinnata L.) seed oil produces waste in the form of cake after extracting the oil from the seeds. Malapari seed cake needs to be processed to get added value. One form of processed malapari meal is in the form of composted organic fertilizer. Malapari cake can be used as compost because it contains minerals including potassium, sodium, calcium, zinc, iron, copper, manganese, phosphorus and sulfur which play a role in stimulating plant growth. Meanwhile, the nutrients contained in oil cake are nitrogen (3.2-3.7%), phosphorus (0.22-0.23%), and potassium (0.65-0.68%). This research aims to analyze the quality of compost from malapari seed cake produced according to SNI 19-7030-2004. This research was carried out in October-December 2023. The research location was at the Plant Physiology Laboratory, FMIPA and Soil Biology Laboratory, Faculty of Agriculture, Udayana University. Making compost consists of 4 treatments. The quantitative compost data obtained is presented in tabular form and compared with the requirements for compost from organic waste SNl 19-7030-2004. The results of the compost research showed that the compost from malapari seed cake had met the compost quality specifications according to SNI 19-7030-2004 for the parameters of water content, potassium and phosphorus, meanwhile, the parameters of pH, nitrogen, organic C, DHL (electrical conductivity), color and the smell does not meet the requirements.